Method and device for synthesizing dinitrile product from nylon acid and/or nylon acid ester

• Main Authors: JIANG SHIFENG, WANG XICHENG, ZHANG SHAOCHUN, LIU XIAORAN, MOU XINDONG
• Format: Patent
• Language: Chinese; English
• Published: 17.05.2024
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The invention discloses a method for preparing a dinitrile product through continuous ammoniation dehydration reaction by taking nylon acid and/or nylon acid ester as a raw material and a device for realizing the method. According to the method, glutaric acid, adipic acid and succinic acid in the nylon acid are respectively converted into glutaric dinitrile, adiponitrile and succinimide at one time through ammoniation dehydration reaction, the three products can be easily separated through simple condensation, and the industrial byproduct nylon acid is converted into high-added-value chemicals through the method. Meanwhile, the separation of three acids is realized, the high-value utilization of wastes is realized, and the production cost can be effectively reduced. 本申请公开了一种以尼龙酸和/或尼龙酸酯为原料，通过连续化的氨化脱水反应来制备二元腈类产品的方法和实现该方法的装置。所述方法通过氨化脱水反应将尼龙酸中的戊二酸、己二酸、丁二酸一次性分别转化为戊二腈，己二腈和丁二酰亚胺，并且这三种产品可以很容易通过简单冷凝实现分离，通过此方法将工业副产品尼龙酸转化为高附加值化学品，同时实现三种酸的分离，实现了废物的高值化利用，可以有效降低生产成本。